Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3
The U.S. mid-Atlantic sea-level record is sensitive to the history of the Laurentide Ice Sheet as the coastline lies along the ice sheet's peripheral bulge. However, paleo sea-level markers on the present-day shoreline of Virginia and North Carolina dated to Marine Isotope Stage (MIS) 3, from 5...
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ftharvardudash:oai:dash.harvard.edu:1/33490941 2023-05-15T16:39:58+02:00 Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 Pico, T Creveling, J. R. Mitrovica, J. X. 2017 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:33490941 https://doi.org/10.1038/ncomms15612 en_US eng Nature Publishing Group doi:10.1038/ncomms15612 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459986/pdf/ Nature Communications Pico, T, J. R. Creveling, and J. X. Mitrovica. 2017. “Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3.” Nature Communications 8 (1): 15612. doi:10.1038/ncomms15612. http://dx.doi.org/10.1038/ncomms15612. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33490941 Journal Article 2017 ftharvardudash https://doi.org/10.1038/ncomms15612 2022-04-05T18:07:20Z The U.S. mid-Atlantic sea-level record is sensitive to the history of the Laurentide Ice Sheet as the coastline lies along the ice sheet's peripheral bulge. However, paleo sea-level markers on the present-day shoreline of Virginia and North Carolina dated to Marine Isotope Stage (MIS) 3, from 50 to 35 ka, are surprisingly high for this glacial interval, and remain unexplained by previous models of ice age adjustment or other local (for example, tectonic) effects. Here, we reconcile this sea-level record using a revised model of glacial isostatic adjustment characterized by a peak global mean sea level during MIS 3 of approximately −40 m, and far less ice volume within the eastern sector of the Laurentide Ice Sheet than traditional reconstructions for this interval. We conclude that the Laurentide Ice Sheet experienced a phase of very rapid growth in the 15 kyr leading into the Last Glacial Maximum, thus highlighting the potential of mid-field sea-level records to constrain areal extent of ice cover during glacial intervals with sparse geological observables. Version of Record Article in Journal/Newspaper Ice Sheet Harvard University: DASH - Digital Access to Scholarship at Harvard Nature Communications 8 1 |
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Harvard University: DASH - Digital Access to Scholarship at Harvard |
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English |
description |
The U.S. mid-Atlantic sea-level record is sensitive to the history of the Laurentide Ice Sheet as the coastline lies along the ice sheet's peripheral bulge. However, paleo sea-level markers on the present-day shoreline of Virginia and North Carolina dated to Marine Isotope Stage (MIS) 3, from 50 to 35 ka, are surprisingly high for this glacial interval, and remain unexplained by previous models of ice age adjustment or other local (for example, tectonic) effects. Here, we reconcile this sea-level record using a revised model of glacial isostatic adjustment characterized by a peak global mean sea level during MIS 3 of approximately −40 m, and far less ice volume within the eastern sector of the Laurentide Ice Sheet than traditional reconstructions for this interval. We conclude that the Laurentide Ice Sheet experienced a phase of very rapid growth in the 15 kyr leading into the Last Glacial Maximum, thus highlighting the potential of mid-field sea-level records to constrain areal extent of ice cover during glacial intervals with sparse geological observables. Version of Record |
format |
Article in Journal/Newspaper |
author |
Pico, T Creveling, J. R. Mitrovica, J. X. |
spellingShingle |
Pico, T Creveling, J. R. Mitrovica, J. X. Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 |
author_facet |
Pico, T Creveling, J. R. Mitrovica, J. X. |
author_sort |
Pico, T |
title |
Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 |
title_short |
Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 |
title_full |
Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 |
title_fullStr |
Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 |
title_full_unstemmed |
Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3 |
title_sort |
sea-level records from the u.s. mid-atlantic constrain laurentide ice sheet extent during marine isotope stage 3 |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:33490941 https://doi.org/10.1038/ncomms15612 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
doi:10.1038/ncomms15612 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459986/pdf/ Nature Communications Pico, T, J. R. Creveling, and J. X. Mitrovica. 2017. “Sea-level records from the U.S. mid-Atlantic constrain Laurentide Ice Sheet extent during Marine Isotope Stage 3.” Nature Communications 8 (1): 15612. doi:10.1038/ncomms15612. http://dx.doi.org/10.1038/ncomms15612. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33490941 |
op_doi |
https://doi.org/10.1038/ncomms15612 |
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Nature Communications |
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8 |
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1 |
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1766030311842381824 |